curl --request POST \
  --url https://api.contracting.kukkingu.software/api/v1/billables \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'tenant-id: <tenant-id>' \
  --data '
{
  "invoiceId": "inv_mqxd1kc6bgtcc676xoqzax47",
  "billables": [
    {
      "name": "Monthly subscription",
      "quantity": 10,
      "amountMinor": 5000,
      "currencyCode": "EUR",
      "referenceType": "JIRA",
      "referenceId": "PROJ-123",
      "description": "Monthly subscription for service X.",
      "metadata": {
        "project": "Alpha",
        "priority": "High"
      },
      "order": 13
    }
  ]
}
'

import requests

url = "https://api.contracting.kukkingu.software/api/v1/billables"

payload = {
    "invoiceId": "inv_mqxd1kc6bgtcc676xoqzax47",
    "billables": [
        {
            "name": "Monthly subscription",
            "quantity": 10,
            "amountMinor": 5000,
            "currencyCode": "EUR",
            "referenceType": "JIRA",
            "referenceId": "PROJ-123",
            "description": "Monthly subscription for service X.",
            "metadata": {
                "project": "Alpha",
                "priority": "High"
            },
            "order": 13
        }
    ]
}
headers = {
    "tenant-id": "<tenant-id>",
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {
    'tenant-id': '<tenant-id>',
    Authorization: 'Bearer <token>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    invoiceId: 'inv_mqxd1kc6bgtcc676xoqzax47',
    billables: [
      {
        name: 'Monthly subscription',
        quantity: 10,
        amountMinor: 5000,
        currencyCode: 'EUR',
        referenceType: 'JIRA',
        referenceId: 'PROJ-123',
        description: 'Monthly subscription for service X.',
        metadata: {project: 'Alpha', priority: 'High'},
        order: 13
      }
    ]
  })
};

fetch('https://api.contracting.kukkingu.software/api/v1/billables', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.contracting.kukkingu.software/api/v1/billables",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'invoiceId' => 'inv_mqxd1kc6bgtcc676xoqzax47',
    'billables' => [
        [
                'name' => 'Monthly subscription',
                'quantity' => 10,
                'amountMinor' => 5000,
                'currencyCode' => 'EUR',
                'referenceType' => 'JIRA',
                'referenceId' => 'PROJ-123',
                'description' => 'Monthly subscription for service X.',
                'metadata' => [
                                'project' => 'Alpha',
                                'priority' => 'High'
                ],
                'order' => 13
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json",
    "tenant-id: <tenant-id>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.contracting.kukkingu.software/api/v1/billables"

	payload := strings.NewReader("{\n  \"invoiceId\": \"inv_mqxd1kc6bgtcc676xoqzax47\",\n  \"billables\": [\n    {\n      \"name\": \"Monthly subscription\",\n      \"quantity\": 10,\n      \"amountMinor\": 5000,\n      \"currencyCode\": \"EUR\",\n      \"referenceType\": \"JIRA\",\n      \"referenceId\": \"PROJ-123\",\n      \"description\": \"Monthly subscription for service X.\",\n      \"metadata\": {\n        \"project\": \"Alpha\",\n        \"priority\": \"High\"\n      },\n      \"order\": 13\n    }\n  ]\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("tenant-id", "<tenant-id>")
	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.contracting.kukkingu.software/api/v1/billables")
  .header("tenant-id", "<tenant-id>")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"invoiceId\": \"inv_mqxd1kc6bgtcc676xoqzax47\",\n  \"billables\": [\n    {\n      \"name\": \"Monthly subscription\",\n      \"quantity\": 10,\n      \"amountMinor\": 5000,\n      \"currencyCode\": \"EUR\",\n      \"referenceType\": \"JIRA\",\n      \"referenceId\": \"PROJ-123\",\n      \"description\": \"Monthly subscription for service X.\",\n      \"metadata\": {\n        \"project\": \"Alpha\",\n        \"priority\": \"High\"\n      },\n      \"order\": 13\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.contracting.kukkingu.software/api/v1/billables")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["tenant-id"] = '<tenant-id>'
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"invoiceId\": \"inv_mqxd1kc6bgtcc676xoqzax47\",\n  \"billables\": [\n    {\n      \"name\": \"Monthly subscription\",\n      \"quantity\": 10,\n      \"amountMinor\": 5000,\n      \"currencyCode\": \"EUR\",\n      \"referenceType\": \"JIRA\",\n      \"referenceId\": \"PROJ-123\",\n      \"description\": \"Monthly subscription for service X.\",\n      \"metadata\": {\n        \"project\": \"Alpha\",\n        \"priority\": \"High\"\n      },\n      \"order\": 13\n    }\n  ]\n}"

response = http.request(request)
puts response.read_body

{
  "data": [
    {
      "id": "bil_eym9hcqlh1m7v3d36blf0vfx",
      "invoice": "inv_mqxd1kc6bgtcc676xoqzax47",
      "name": "Monthly subscription",
      "quantity": 10,
      "amountMinor": 5000,
      "currencyCode": "EUR",
      "createdAt": "2023-10-05T14:48:00.000Z",
      "updatedAt": "2023-10-05T14:48:00.000Z",
      "referenceType": "JIRA",
      "referenceId": "PROJ-123",
      "description": "Monthly subscription for service X.",
      "metadata": {
        "project": "Alpha",
        "priority": "High"
      },
      "order": 13
    }
  ]
}

{
  "error": "ValidationError",
  "message": "<string>",
  "details": [
    {
      "field": "<string>",
      "message": "<string>",
      "constraint": "<string>"
    }
  ]
}

{
  "error": "Unauthorized",
  "message": "Unauthorized"
}

{
  "error": "Forbidden",
  "message": "Forbidden"
}

{
  "error": "NotFound",
  "message": "Not Found"
}